import {Injectable} from '@angular/core';
import {HttpClient} from "@angular/common/http";
import {SearchResult} from '../utils/entities/searchResult';
import {RefineResultsUtils} from './servicesUtils/refineResults.class';
import {DOI, StringUtils} from '../utils/string-utils.class';
import {ParsingFunctions} from '../landingPages/landing-utils/parsingFunctions.class';
import {EnvProperties} from '../utils/properties/env-properties';
import {map} from "rxjs/operators";


@Injectable()
export class SearchResearchResultsService {
    private sizeOfDescription: number = 270;
    public parsingFunctions: ParsingFunctions = new ParsingFunctions();

    constructor(private http: HttpClient ) {}

    search (resultType:string, params: string, refineParams:string, page: number, size: number, sortBy: string, refineFields:string[] , properties:EnvProperties):any {
        let link = properties.searchAPIURLLAst+this.getEntityName(resultType,true);

        let url = link+"?";
        if(params!= null && params != ''  ) {
            url += params;
        }
        if(refineParams!= null && refineParams != ''  ) {
            url += refineParams;
        }
        if(sortBy) {
          url += "&sortBy=" + sortBy;
        }
        url += "&page="+(page-1)+"&size="+size+"&format=json";


        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    .pipe(map(res => [res['meta'].total, this.parseResults(resultType, res['results'], properties),RefineResultsUtils.parse(res['refineResults'],refineFields, "publication")]));
    }
    searchById (resultType:string, id: string, properties:EnvProperties ):any {

        let url = properties.searchAPIURLLAst+this.getEntityName(resultType,true) +"/"+id+"?format=json";

        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    .pipe(map(res =>  this.parseResults(resultType, res, properties)));
    }
//???
    searchAggregators (id: string, params: string, refineParams:string, page: number, size: number, properties:EnvProperties ):any {

        let link = properties.searchAPIURLLAst+"publications";

        let url = link+"?"+"&format=json";
        if(params!= null && params != ''  ) {
            url += params;
        }
        if(refineParams!= null && refineParams != ''  ) {
            url += refineParams;
        }
        url += "&page="+(page-1)+"&size="+size;



        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    //.map(res => <any> res.json())
                    .pipe(map(res => this.parseRefineResults(id, res['refineResults'])));
    }

    searchByListOfDOI (resultType:string, DOIs: string[], refineParams:string, page: number, size: number, refineFields:string[], properties:EnvProperties ):any {

        let link = properties.searchAPIURLLAst+ this.getEntityName(resultType,true);

        let url = link+"?"+"&format=json&";
        var doisParams = "";

        for(var i =0 ;i < DOIs.length; i++){
          doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
        }
        if(doisParams.length > 0){
          url +="&"+doisParams;

        }
        if(refineParams!= null && refineParams != ''  ) {
            url += refineParams;
        }
        url += "&page="+(page-1)+"&size="+size;

        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    //.map(res => <any> res.json())
                    //.do(res => console.info(res))
                    .pipe(map(res => [res['meta'].total, this.parseResults(resultType, res['results'], properties),RefineResultsUtils.parse(res['refineResults'],refineFields, "publication")]));
    }

    advancedSearch (resultType:string, params: string, page: number, size: number, sortBy: string, properties:EnvProperties ):any {
      let url = properties.searchResourcesAPIURL;
      var basicQuery = "(oaftype exact result) and (resulttypeid exact "+this.getEntityName(resultType,false) + ") ";
      url += "?query=";
      if(params!= null && params != ''  ) {
        url +=" ( "+basicQuery+ " ) " +" and (" + params + ")";
      }else{
        url +=" ( "+basicQuery+ " ) ";
      }

      if(sortBy) {
        let sortOptions = sortBy.split(",");
        url += "sortBy "+sortOptions[0]+"/sort."+sortOptions[1]+" ";
      }

      url += "&page="+(page-1)+"&size="+size;
      url += "&format=json";

      return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
      //.map(res => <any> res.json())
      //.do(res => console.info(res))
      .pipe(map(res => [res['meta'].total, this.parseResults(resultType, res['results'], properties)]));
    }
    searchResultForEntity (resultType:string, params: string, page: number, size: number, properties:EnvProperties):any {
        let link = properties.searchAPIURLLAst;
        let url = link+params+"/"+this.getEntityName(resultType,true)+ "?format=json";
        url += "&page="+(page-1)+"&size="+size;



        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    .pipe(map(res => [res['meta'].total, this.parseResults(resultType, res['results'], properties)]));
    }
//???? why different from above?
    searchForDataproviders(resultType:string, params: string, page: number, size: number, properties:EnvProperties):any {
        let link = properties.searchAPIURLLAst;
        let url = link+params+ "&page="+(page-1)+"&size="+size + "&format=json";
        return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                    .pipe(map(res => [res['meta'].total, this.parseResults(resultType, res['results'], properties)]));
    }

    parseResults(resultType:string, data: any, properties: EnvProperties): SearchResult[] {
        let results: SearchResult[] = [];

        let length = Array.isArray(data) ? data.length : 1;

        for(let i=0; i<length; i++) {
            let resData = Array.isArray(data) ? data[i]['result']['metadata']['oaf:entity']['oaf:result'] : data['result']['metadata']['oaf:entity']['oaf:result'];

            var result: SearchResult = new SearchResult();
            result.entityType = resultType;

            result.types = new Array<string>();
            let types = new Set<string>();

            let instance;
            let length = Array.isArray(resData['children']['instance']) ? resData['children']['instance'].length : 1;

            for(let i=0; i<length; i++) {
              instance = Array.isArray(resData['children']['instance']) ? resData['children']['instance'][i] : resData['children']['instance'];
              this.parsingFunctions.parseTypes(result.types, types, instance);
            }

            if(resData['language'] && resData['language'] != null) {
              result.languages = new Array<string>();

              if(!Array.isArray(resData['language'])) {
                if(resData['language'].classname != "Undetermined" && resData['language'].classname) {
                  result.languages.push(resData['language'].classname);
                }
              } else {
                for(let i=0; i<resData['language'].length; i++) {
                  if(resData['language'][i].classname != "Undetermined" && resData['language'][i].classname) {
                    result.languages.push(resData['language'][i].classname);
                  }
                }
              }
            }

            if(resData['country'] && resData['country'] != null) {
              result.countriesForResults = new Array<string>();

              if(!Array.isArray(resData['country'])) {
                if(resData['country'].classname != "Undetermined" && resData['country'].classname) {
                  result.countriesForResults.push(resData['country'].classname);
                }
              } else {
                for(let i=0; i<resData['country'].length; i++) {
                  if(resData['country'][i].classname != "Undetermined" && resData['country'][i].classname) {
                    result.countriesForResults.push(resData['country'][i].classname);
                  }
                }
              }
            }

            result['title'] = {"name": '', "accessMode": '', "sc39": ''};

            if(Array.isArray(resData['title'])) {
                // resData['title'][0].hasOwnProperty("content") {
                    result['title'].name = String(resData['title'][0].content);
                // }
            } else {
                // resData['title'].hasOwnProperty("content") {
                    result['title'].name = String(resData['title'].content);
                // }
            }

            //result['title'].url = OpenaireProperties.getsearchLinkToPublication();
            //result['title'].url += Array.isArray(data) ? data[i]['result']['header']['dri:objIdentifier'] : data['result']['header']['dri:objIdentifier'];
            result['id'] = Array.isArray(data) ? data[i]['result']['header']['dri:objIdentifier'] : data['result']['header']['dri:objIdentifier'];
            if(resData['bestaccessright'] && resData['bestaccessright'].hasOwnProperty("classid")) {
                result['title'].accessMode = resData['bestaccessright'].classid;
            }

            if(resData['rels'].hasOwnProperty("rel")) {
                let relLength = Array.isArray(resData['rels']['rel']) ? resData['rels']['rel'].length : 1;

                for(let j=0; j<relLength; j++) {
                    let relation = Array.isArray(resData['rels']['rel']) ? resData['rels']['rel'][j] : resData['rels']['rel'];

                    if(relation.hasOwnProperty("to")) {
                        /*if(relation['to'].class == "hasAuthor") {
                            if(result['authors'] == undefined) {
                                result['authors'] = new Array<{"name": string, "id": string}>();
                            }

                            result['authors'].push({"name": relation.fullname, "id": relation['to'].content});
                        } else */if(relation['to'].class == "isProducedBy") {
                            result['projects'] = this.parseProjects(result['projects'], relation);
                        }
                    }
                }
            }

            if(resData.hasOwnProperty("creator") && resData['creator'] != null) {
              if(result['authors'] == undefined) {
                result['authors'] = new Array<{"fullName": string, "orcid": string}>();
              }

              let authors = resData['creator'];
              let length = Array.isArray(authors) ? authors.length : 1;

              for(let i=0; i<length; i++) {
                let author = Array.isArray(authors) ? authors[i] : authors;
                if(author) {
                  /*if (author.ORCID && author.ORCID.indexOf(properties.orcidURL) != -1) {
                    author.ORCID = author.ORCID.substr(properties.orcidURL.length);
                  }*/
                  result['authors'][author.rank] = {"fullName": author.content, "orcid": author.ORCID};
                }
              }
              result.authors = result.authors.filter(function (item) {
                return (item != undefined && item.fullName != undefined);
              });
            }

            var date:string = (resData.dateofacceptance)+""; // transform to string in case it is an integer
            result.year = (date && (date).indexOf('-') !== -1)?date.split('-')[0]:date;

            if(!Array.isArray(resData.description)) {
                result.description = String(resData.description);
            } else {
                result.description = String(resData.description[0]);
            }

            if(result.description && result.description.length > this.sizeOfDescription) {
                result.description = result.description.substring(0, this.sizeOfDescription) + "...";
            }


            result.embargoEndDate = resData.embargoenddate;

            results.push(result);
        }

        return results;
    }

    parseProjects(projects: { "id": string, "acronym": string, "title": string,
                              "funderShortname": string, "funderName": string,
                              "code": string }[], relation: any ) :  {
                              "id": string, "acronym": string, "title": string,
                              "funderShortname": string, "funderName": string,
                              "code": string }[] {
      if(projects == undefined) {
          projects = new Array<
              { "id": string, "acronym": string, "title": string,
                "funderShortname": string, "funderName": string,
                "code": string
              }>();
      }

      let countProjects = projects.length;

      projects[countProjects] = {
          "id": "", "acronym": "", "title": "",
          "funderShortname": "", "funderName": "",
          "code": ""
      }

      if(relation.title != 'unidentified') {
          projects[countProjects]['id'] =
              /*OpenaireProperties.getsearchLinkToProject() + */relation['to'].content;
          projects[countProjects]['acronym'] = relation.acronym;
          projects[countProjects]['title'] = relation.title;
          projects[countProjects]['code'] = relation.code;
      } else {
          projects[countProjects]['id'] = "";
          projects[countProjects]['acronym'] = "";
          projects[countProjects]['title'] = "";
          projects[countProjects]['code'] = "";
      }

      if(relation.hasOwnProperty("funding")) {
          let fundingLength = Array.isArray(relation['funding']) ? relation['funding'].length : 1;

          for(let z=0; z<fundingLength; z++) {
              let fundingData = Array.isArray(relation['funding']) ? relation['funding'][z] : relation['funding'];

              if(fundingData.hasOwnProperty("funder")) {
                  projects[countProjects]['funderShortname'] = fundingData['funder'].shortname;
                  projects[countProjects]['funderName'] = fundingData['funder'].name;
              }
          }
      }

      return projects;
    }
    parseRefineResults(id: string, data: any): any {
        var results:any = [];
        if(data.hasOwnProperty("resulthostingdatasource")) {
            let length = Array.isArray(data['resulthostingdatasource']) ? data['resulthostingdatasource'].length : 1;

            for(let i=0; i<length; i++) {
                let datasource = Array.isArray(data['resulthostingdatasource']) ? data['resulthostingdatasource'][i] : data['resulthostingdatasource'];

                let result: {"name": string, "id": string, "count": number} = {"name": "", "id": "", "count": 0};
                result['name'] = datasource.name;
                result['id'] = datasource.id.split("||")[0];
                //result['url'] = OpenaireProperties.getsearchLinkToDataProvider()+result['id'];
                result['count'] = datasource.count;

                if(result['id'] != id && result['name'] != "Unknown Repository") {
                    results.push(result);
                }
            }
        }
        return results;
    }

    private numOfResults(url: string, properties:EnvProperties): any {

      return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                  //.map(res => <any> res.json())
                  .pipe(map(res => res['total']));
    }

    numOfEntityResults(resultType:string, id: string, entity: string, properties:EnvProperties):any {
        var parameters: string = "";
        parameters = this.getEntityName(entity, true) + "/"+id+"/"+this.getEntityName(resultType, true)+"/count";
        let url = properties.searchAPIURLLAst+parameters+"?format=json";
        return this.numOfResults(url , properties);
    }

    numOfSearchResults(resultType:string, params: string, properties:EnvProperties, refineParams:string=null):any {
        let url = properties.searchAPIURLLAst+this.getEntityName(resultType, true)+"/count?format=json";
        if(params.length > 0){
          var DOIs:string[] = DOI.getDOIsFromString(params);
          var doisParams = "";

          for(var i =0 ;i < DOIs.length; i++){
            doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
          }
          if(doisParams.length > 0){
            url += "&"+doisParams;
          }else{
            url += "&q=" + StringUtils.URIEncode(params);
          }
        }
        // if(params != "") {
        //   url += "&q=" + StringUtils.URIEncode(params);
        // }
        if(refineParams!= null && refineParams != ''  ) {
            url += refineParams;
        }
        return this.numOfResults(url, properties);
    }
  countTotalResults(resultType:string,  properties:EnvProperties, refineParams:string=null):any {
    let url = properties.searchAPIURLLAst+this.getEntityName(resultType, true)+"/count?format=json"+refineParams;
    return this.numOfResults(url, properties);
  }
/*
    private quote(word: any): string {
        return '"'+word+'"';
    }
*/

  private getEntityName (entityType:string, plural:boolean){
    if(entityType == "publication" ||entityType == "dataset" || entityType == "organization" || entityType == "datasource" || entityType == "project" ){
      if(plural){
        return entityType+ "s";
      }else{
        return entityType;
      }
    }else{
      return entityType;
    }
  }
}